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<head>
 <meta charset="UTF-8">
 <title>html5的video标签</title>
 </head>
 <body>
	<video src="abc.mp4" width="400px" height="400px" poster="dog.gif" controls="controls" >你的浏览器不支持html5请升级您的浏览器</video>
 </body>
 </html>